Should me and my boyfriend do a separate PR application or get married and have a spouse for the application?

Hi everyone, so here is my situation:

Me and my bf both are in the maintained status for PGWP and we are starting to think about apply for MPNP. So both of us are all graduating from the University and all have a job offer right now. However, my job is in demand list in Manitoba and my bf is not. So I could apply for International Student Stream which is I think it’s less competitive than the Skilled Worker one. Additionally, I might be eligible for licensing body requirements in 2-3 years so I think I might have better chance than my bf.

So now, I was thinking of doing the PR application with him so that if I am be able to have nomination, he will have it (because based on the scores right now, he might not be able to join the pool since his score is not that high).

However, in my personal side, I feel like I don’t want to get married because of these stuffs ( I love him and we have been together for 5 years but it feel like we get married on purpose).

We could not do common law since I am on the lease with my sister right now and it will take 1 year for the year to be end. Also another year for common law status which will be kinda too late for both of us.